The problem is that many Brexiteers see the Brexit-related border issue linked to illigal immigrants swamping the country. The EU sees the border issue as a question of trade, tariffs and standards. Two wholly different worlds and resulting problems.

Drivel.

I know of no one who in any way associates it with immigration. They do, however, see it is as binding the U.K. into the customs union and single market, and hence observation of the entire EU Acquis and subordination to the rulings of the EUCJ.